Hardening and Maintenance of Linux Servers: A Success Story at ForgeNEX

At ForgeNEX, the security and performance of Linux servers are fundamental pillars. Recently, we implemented a comprehensive hardening and maintenance process that not only strengthened our infrastructure but also optimized operational costs. This success story demonstrates how good practices in Linux systems can transform IT management.

The challenge: vulnerable servers and rising costs

Our client, a financial services company, faced multiple security breaches on their Linux servers (Ubuntu and CentOS). Security patches were applied manually, firewall configurations were inconsistent, and logs were not centralized. Additionally, reactive maintenance caused unplanned downtime. As we saw in our article on Advanced Solutions in Microsoft Azure, the cloud can be an ally, but local hardening remained critical.

The solution: systematic hardening and automation

We designed a three-phase plan:

• Initial assessment: Vulnerability scanning with Lynis and OpenSCAP, identifying 120+ critical risks.
• Hardening: Application of CIS Benchmarks configurations, disabling unnecessary services, configuring SELinux/AppArmor, and SSH hardening (keys, fail2ban).
• Continuous maintenance: Patch automation with Ansible, monitoring with Prometheus and Grafana, and log rotation with Logrotate.

Results: robust security and operational efficiency

In just three months, we achieved:

• 90% reduction in critical vulnerabilities.
• 40% decrease in security-related support tickets, similar to what can be achieved by delegating tasks to AI (see How to Delegate 40% of Tickets to AI).
• 30% savings in maintenance costs by eliminating manual processes.
• Improved compliance with regulations (PCI DSS, GDPR).

Lessons learned and next steps

Hardening is not a one-time event but a continuous process. We recommend integrating Information Security and Cybersecurity tools from the design phase. For more success stories, visit our Success Stories category.